Valentine

First, the heart-lung shot was always highly recommended by experts, to hunters, because it was a bigger target. There were other shots, but accuracy, not found in some hunters, is required.

I learned knock down shots, because I hunted deer in swamps, when young. I would take aim at a broad side standing deer, move up its leg, and aim the shot in the upper part of the deer. I found hitting the shoulder/artery area very effective. Move up the leg and target the more upper part of the deer body, rather than the lower part.

I never had to track a deer, five feet or more, through a swamp. Oh, and I used that most powerful of deer cartridges in my rifle -the .35 Remington.
Except when I was using a .50 caliber round ball in my flintlock.